Tone arm



March 25, 1930. 1 F|$HER 1,752,245

TONE ARM Filed July 20, 1928 llllll ll lllllllllHHIIIHHIHJJHIH 'INVENTOR.

Juliusil ischer;

Patented Mar. 25, 1930 JULIUFS A. FISCHER, OF PHILADELPEIA, PENNSYLVANIA TONE ARM Application filed July 20,

arresting the shifting of the sections thereof With relation to each other;

With the above and other objects in view, the invention consists of the .novel construe tion, arrangement and. combination of parts as hereinafter more specifically described,

andas illustrated in the accompanying drawings, wherein like numerals are employed to designate like parts throughout the same, and

in which,

Figure 1 is a plan of an attachment in accordance with this invention, attached to a sound box shown in operative position.

Figure 2 is a section taken on line 22 Figure 1.

of the structure shown in Figure 1.

Figure 4 is a section taken'on line M Figure 2.

Figure 5 is a section taken on line 5-5 ao -Figure 2.

Figure 6 is a fragmentary perspective view of the goose neck.

Figure 7 is a perspective view of the elbow which connects the goose neck with the tone f I arm coupling.

In the drawings wherein for the purpose of illustration is shown an embodiment of my invention, the numeral 1 designates a sound box, which may be of' any well known construction, and forms no part of this in vention. Carried by the sound box 1 is a goose neck indicated generally at 2, which is connected by one of its ends 3 with the sound box, and gradually increases in diameter from such end 3 to the'opposite end 4:. The goose neck is provided with a curved portion 5, substantially in the form of a semicircle, said curved portion being located between the transverse median of the length of the goose neck 2 and the smaller end 3 there- Figure 3 is a fragmentary front elevation.

1928. serial No. 294,270.

of, so that the larger end l extends forwardly beyond the smaller end 3. Spaced from the end edge 6 of the goose neck 2, as more clearly shown in F igure 6," is a slot 7 which extends circumferentially of the goose neck, for substantially one-half the circumference thereof. Adapted for connec tion with the end 4c of the goose neck 2, is an elbow 8, which is formed at one end with i an enlarged outwardly ofiset portion 9, thereby forming therein an annular shoulder 10. The width of the shoulder 10 is equal to the 1 thickness ofthe wall 2. The inner diameter of the enlarged portion 9 is slightly greater than the outer diameter of the end 4 of the goose neck 2, in order that the end may be loosely received within the enlarged portion 9.

When the elbow 8 and the goose neck 2 are in assembled relation, the edge 6 ofthe goose I neck 2 is inabutrnent with the'shoulder 10, k

and an uninterrupted passage is provided between the two parts. Threaded through the wall of the enlarged portion 9 is a set'scr'ew 11, which extends intothe slot 7 and prevents longitudinal movement between. the goose neck 2 and the elbow.8. Relative rotary x movement is provided between the goose neck f 2 and the elbow 8, for a circumferential distance equal to the length ofthe slot7. At-thei termini of this rotary movement, the set .screw 11 a lzauts against the respective ends ofthe slot."'

The elbow 8 is formed the ends thereof. l at right angles to each other, and the end 12.

opposite to the end 9 is formed with a reduced externally'threaded neck 12, and an external. annular shoulder 13. w Projecting from the i A tone armtcoupling 16' is connected the elbow 8, by means of the internal threads .17 which engage the external threads .of the neck 12.1 The end of. the tonearmfcoupling 9 16, which is in engagement with the elbow 8 is enlarged and formed with an angular re- 7 cess to provide a shoulder 18 and a lip 19.

When the tone arm coupling 16 and the el- 5 bow 8 are in assembled relation, the shoulders 18 and 13 are in abutment and the inner surface of the lip 19 is in engagement with the outer surface of the elbow 8. A set screw 20 extends through the wall of the tone arm 16, and projects between the studs 15 projecting from the end of the neck 12. Limited rotary movement is provided between the tone arm 16 and the elbow 8, for a circumferential distance equal to the circumferential distance between the studs 15. The 0pposite end of the tone arm coupling is offset substantially at a right angle, andis provided with a transversely extending bore 21, for connection with atone arm not shown.

It will be readily seen that my improved attachment provides for free movement of the sound box, in both a vertical and a horizontal plane, without the necessity of any movement of the tone arm. Due to the threaded connection between the tone arm coupling 16 and elbow 8, and to the removable set screw 20, the foregoing movement of the sound box may be had regardless of the angular relation between the end portion l of the goose neck 2 and thetone arm with which the tone arm coupling 16 is adapted to be connected. By this arrangement the tonearm may be extended from any direction desired.

It is to be understood that the embodiment of the invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the size, shape and arrangement of parts may be resorted to without departing from the spirit of the inventionor the scope of the appended claims.

What I claim'is: V

1. An attachment for sound boxes comprising, a goose neck adapted to be connected with a sound box, an elbow rotatably connected with the goose neck, means for limiting the rotary movement between the elbow and goose neck, a tone arm coupling adapted to be connected with a tone arm, and means connecting the tone arm couplingwith the elbow to permit a limited rotary movement therebetween, said last named means coacting with the connection between the elbow and goose neck to provide for horizontal and vertical movements of the sound box regardless of the angular'relation of the tone arm with respect to the goose neck.

2. Anattachment for sound boxes compriswith a soundbox,an elbow rotatably connected with the goose neck, means for limiting the roe tary movement between the elbowand goose neck, a tone arm couphngadapted to be connected with a tone arm, and means connecting the tone arm coupling with the elbow to permit a limited rotary movement therebetween, said last'named means coacting with the connection between'the elbow and goose neck to provide for horizontal and vertical mg, a goose neck adapted to be connected movements of the sound box regardless of the angular relation of the tone arm with respect to the goose neck, said last named means including external threads adjacent one end of the elbow, a pair of spaced studs projecting from said end, internal threads on the tone arm coupling for engagementv with said external threads, and a removable set screw extending through the wall of the tone arm coupling and projecting between said studs.

3. An attachment for sound boxes com prising, a goose neck adapted to be connected with a sound box, an elbow rotatably-connected with the goose neck, means for limit ing the rotary movement between the elbow and goose neck, a tone arm coupling adapted I I to be connected with a tone arm, and means connecting the tone arm coupling with the wall of the tone arm cou lin and ro'ectin between said studs, said tone arm coupling being formed with an internal recess adjacent said internal threads, said elbow having an external shoulder adjacent said external threads for engagement in said recess.

In testimony whereof, hereto.

I aflix my signature Jones A. FISCHER. 

